<template>
  <div>
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th>
            <input type="checkbox" v-model="allCheck" /> <span>全选</span>
          </th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
        <hero
          v-for="(item, index) in goodList"
          @delList="delList"
          :list="item"
          :key="index"
        />
      </tbody>
      <tfoot>
        <tr>
          <td>合计:{{ totalPrice }}</td>
          <td colspan="5"></td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
import hero from './components/hero'
export default {
  components: {
    hero
  },
  computed: {
    allCheck: {
      get () {
        return this.goodList.every(item => item.checked)
      },
      set (b) {
        this.goodList.forEach(item => {
          item.checked = b
        })
      }
    },
    totalPrice () {
      let total = 0
      this.goodList.forEach(item => {
        if (item.checked) {
          total += item.num * item.price
        }
      })
      return total
    }
  },
  methods: {
    delList (n) {
      const index = this.goodList.findIndex(item => {
        return item.name === n
      })
      this.goodList.splice(index, 1)
    }
  },
  data () {
    return {
      goodList: [
        {
          name: '诸葛亮',
          price: 1000,
          num: 1,
          checked: false
        },
        {
          name: '蔡文姬',
          price: 1500,
          num: 1,
          checked: false
        },
        {
          name: '妲己',
          price: 2000,
          num: 1,
          checked: false
        },
        {
          name: '鲁班',
          price: 2200,
          num: 1,
          checked: false
        }
      ]
    }
  }
}
</script>

<style></style>
